Fixed-Bed Adsorption of Lead from Aqueous Solution Using Chitosan-Coated Bentonite
| Autor: | Cybelle Morales Futalan, Meng-Wei Wan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Chitosan
Lead Health Toxicology and Mutagenesis Spectroscopy Fourier Transform Infrared adsorption bentonite breakthrough curve Clark model chitosan fixed-bed lead Thomas model Bentonite Public Health Environmental and Occupational Health Water Adsorption Water Pollutants Chemical Water Purification |
| Zdroj: | International Journal of Environmental Research and Public Health; Volume 19; Issue 5; Pages: 2597 |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph19052597 |
| Popis: | In this study, fixed-bed adsorption of Pb(II) from an aqueous solution using chitosan-coated bentonite (CCB) was investigated. Characterization of CCB was performed using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The effects of varying bed height (1.3 to 4.3 cm), flow rate (0.20 to 0.60 mL/min), and initial concentration (500 to 1500 mg/L) on the length of mass transfer zone (Zm) and adsorption capacity at breakthrough (qb) and exhaustion (qe) were examined. Low flow rate and high bed height were determined to cause a longer time to reach breakthrough and exhaustion. Meanwhile, the fixed-bed system was observed to quickly attain breakthrough and exhaustion under high initial concentrations. Kinetic column models such as the Thomas, Yoon–Nelson, and Clark models were used to predict the breakthrough curves. High R2 values (0.9758 ≤ R2 ≤ 0.8087) were attained for the Thomas model, which indicates that there is good agreement between experimental data and linear plots generated by the Thomas model. Moreover, the Thomas model is best in describing the breakthrough curves of Pb(II) removal under a fixed-bed system. |
| Databáze: | OpenAIRE |
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